/*
 * Copyright 2004 original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jbfilter.bean;

import java.util.Collection;
import java.util.List;

import org.jbfilter.core.FilterHandler;

/**
 * The filter handler for {@link FilterBean}'s.
 * To filter the following properties must be set :
 * <ul>
 * <li>{@code items}
 * </ul>
 * @author Marcus Adrian
 * @param <E> the type of the beans to filter
 */
public class FilterHandlerBean<E> implements FilterHandler<E> {

	private FilterBean<E> filter;
	private Collection<E> beanCollection;
	private E[] beanArray;
	
	public FilterHandlerBean(FilterBean<E> filter) {
		this.filter = filter;
	}
	@Override
	public List<E> filter() {
		if (beanCollection != null) {
			return filter.filter(beanCollection);
		} else if (beanArray != null) {
			return filter.filter(beanArray);
		} else {
			throw new IllegalStateException("items must be set prior to filter method call.");
		}
	}
	public void setItems(Collection<E> beanCollection) {
		this.beanCollection = beanCollection;
	}
	public void setItems(E[] beanArray) {
		this.beanArray = beanArray;
	}

}
